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DAOKI 5 PCS AC DC Power Supply Buck Converter Step Down Module 12v 5v 3.3v 9v

3.2 3.2 out of 5 stars 29 ratings
Currently unavailable.
We don't know when or if this item will be back in stock.
Brand DAOKI
Input Voltage 265 Volts, 5 Volts
Output Voltage 5 Volts

About this item

  • The power supply for whole isolation type industrial-grade built-in power supply module
  • temperature protection, over current protection and short circuit protection
  • AC 85 ~ 265v wide voltage input, high and low voltage isolation
  • 9V output voltage isolation, 431 voltage, output EMI filter circuit, with light, with mounting holes, high cost performance
  • Use Environment:<br />- Working temperature:-20 ~ 60°<br />- Relative humidity:40 ~ 90%RH

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Package Dimensions ‏ : ‎ 4.02 x 3.74 x 0.98 inches; 2.89 ounces
  • Item model number ‏ : ‎ TS-US-067-9V
  • Date First Available ‏ : ‎ March 16, 2017
  • Manufacturer ‏ : ‎ DAOKI
  • ASIN ‏ : ‎ B06XPGFW2L
  • Customer Reviews:
    3.2 3.2 out of 5 stars 29 ratings

Product Description

Description:
Technical requirements
- Input voltage range:85~ 265v
- Input current:0.027A(AC110V)
0.0136A(AC220V)
- Input Inrush Current: 20A
- Output voltage range:11.80~12.5V 0~1A
4.90~5.1V 0~1A
- Output power:0 ~18.5 W
- Output efficiency:84%
- Size:7.5*4.0*2.8(cm)
- Installation :A.In the input and output pins soldering on the PCB directly
B.Fixed installation hole
12V 450mA
Description:
The power supply for whole isolation type industrial-grade built-in power supply module, temperature protection, over current protection and short circuit protection,AC 85 ~ 265v wide voltage input, 431 precision voltage, DC12V output, small size, stable performance, cost-effective
-input voltage of AC85 ~ 265v 50/60 HZ
-Output voltage DC12V (±0.1V)
-Output current 450MA
-Power 5 w
Use Environment:
- Working temperature:-20 ~ 60°
- Relative humidity:40 ~ 90%RH
Technical requirements
- Input voltage range:85~ 265v
- Input current:0.0273A(AC110V)
0.014A(AC220V)
- Input Inrush Current: 20A
- Output voltage range:11.80~12.1V 0~500mA
- Output power:0 ~6.0 W
- Output efficiency:80%
- Size:3*2*1.8cm
- Installation :A.In the input and output pins soldering on the PCB directly
B.Glue in fixed
5V 1A

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Customer reviews

3.2 out of 5 stars
3.2 out of 5
29 global ratings

Customers say

Customers are unhappy with the output voltage, documentation, and performance of the electronic component. They mention that the output is only 0.33A, the board is marked wrong, and the input/output connections are annoyingly difficult. Some say that the product does not function as labeled and that only 2 of the 5 boards work. Opinions are mixed on quality.

AI-generated from the text of customer reviews

13 customers mention5 positive8 negative

Customers have mixed opinions about the quality of the electronic component. Some mention that it works fine so far and is good for their use, while others say that it drifts around with an unstable output, is useless, and has a problem with the identification. Some customers also mention that the output contacts are mislabeled and the board is marked wrong.

"...And one was just drifting around with an unstable output...." Read more

"Works as expected." Read more

"No documentation, board is marked wrong (thanks to others for pointing this out for me in advance), Hooked the first one up to power(no load) and..." Read more

"...to 11.5V and later to 11V, and the current is only 0.33A. The smaller fan works fine, measurements show 12V 0.075A...." Read more

4 customers mention0 positive4 negative

Customers are dissatisfied with the output voltage of the power converter. They mention that the current is only 0.33A, and the output is only around half of what it should be. Some customers also report that the boards they received did not have 5 volts present at the PC holes, though they were marked as 5V.

"...When they failed, the output voltage usually dropped to around half of what it should be -- or that was the failure mode of two of them...." Read more

"...12V 0.4A, the voltage drops to 11.5V and later to 11V, and the current is only 0.33A. The smaller fan works fine, measurements show 12V 0.075A...." Read more

"...The boards I received did not have 5 volts present at the PC holes though marked as 5v...." Read more

"...Two immediately fried when plugged in and the remaining three just didn't pass any voltage through...." Read more

3 customers mention0 positive3 negative

Customers find the documentation for the power converter lacking and annoyingly difficult for beginners. They also mention that the board is marked wrong.

"...the wires to the board for input/output connections was annoyingly difficult...." Read more

"No documentation, board is marked wrong (thanks to others for pointing this out for me in advance), Hooked the first one up to power(no load) and..." Read more

"...Just no documentation for a beginner DIY." Read more

3 customers mention0 positive3 negative

Customers are dissatisfied with the performance of the electronic component. They mention that it doesn't function as labeled and that only 2 of the 5 boards work.

"...Working fine so far. The rating is based on the product not functioning as labeled and the circuit board not being clean and free of the soldering..." Read more

"...Even the tips from other users about changing the solder points didn’t work. Just pure garbage." Read more

"Leaving 2 stars because only 2 of the 5 boards work. The others pulse on and off, even when the DC side is not connected to anything...." Read more

5V output not where you'd expect it to be. Otherwise, pretty decent buck converter
3 Stars
5V output not where you'd expect it to be. Otherwise, pretty decent buck converter
Like another review here I had the same issue where I wasn't getting the 5V output at the labeled holes. Thanks to his review I was able to determine that U3, at a minimum, is missing a jumper. See attached photo. Red circle is U3, orange circle is where you need to solder to get 5V. Once I figured that out everything else worked like a champ. My use case is to power a Wemos D1 Mini and a 5V relay in a home automation switch. So far, so good, but the manufacturer needs to resolve the open U3 connection.
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Top reviews from the United States

Amazon Customer
5.0 out of 5 stars Five Stars
Reviewed in the United States on March 16, 2018
Verified Purchase
Works as expected.
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Donna W.
3.0 out of 5 stars Usable, but definitely a crap shoot
Reviewed in the United States on October 23, 2021
Verified Purchase
I got the 9V version, which was the best fit for my application. I needed a total of 9 of them and figured two bags of 5 would give me the 9 and a spare ... but ... two were DOA and one failed only a couple of weeks in use, even with a light load on it, so I had to order a couple more bags of them to have enough.

In my 40+ years of electronics work, I've never encountered solder quite as bad as what is on these boards, and I don't just mean the quality of their solder work but the actual chemical composition of the solder itself. It must be some experimental solder paste they used in their reflow process or something, but it does not want to flow and bond like it should. And I think that's a large part of the failures people are reporting -- from cold solder joints. Even soldering the wires to the board for input/output connections was annoyingly difficult. It's like the solder has a wax-like base to it that you have to get hot enough to burn off before the solder will actually start flowing and adhering to the metal like it should.

I recommend touching up all of their solder joints, especially on the through-hole components, and be on the lookout for random solder blobs that they left behind and remove them. I found several loose solder blobs on the boards I received that were just waiting to short something out on the board if left there.

I can't speak much to the fully load capacity and how much current they can truly deliver, since I only needed them to source a couple hundred milliamps. When they failed, the output voltage usually dropped to around half of what it should be -- or that was the failure mode of two of them. And one was just drifting around with an unstable output. It was still trying to produce 9v, only it was drifting around 9v rather than holding a steady output voltage.

They did work for my application and I haven't found another inexpensive alternative that's better yet. If you get these, be sure to buy plenty of spares and test them before connecting them permanently to something, and try to keep future replacement in mind in case it dies on you. They do slide nicely inside of 1" (25mm) heat-shrink tubing, which works as a good insulator for it and keeps it somewhat easy to replace when it dies.
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Premeditated Trouble
1.0 out of 5 stars Absolute junk!
Reviewed in the United States on September 4, 2018
Verified Purchase
No documentation, board is marked wrong (thanks to others for pointing this out for me in advance), Hooked the first one up to power(no load) and poof! Dead in a microsecond. Yes, it was hooked up correctly. Second board, puts out 3.3 volts(close enough) but power is totally unstable. It's only powering an ESP8266-12F but every few seconds, the light starts flashing and the ESP reboots. Connected an alternate supply and everything works just fine. I measured the actual current draw with a working power supply and the peek draw is under 150ma. Bottom line, don't buy this garbage!
4 people found this helpful
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Kirill Kolyshkin
4.0 out of 5 stars Fine for smaller loads
Reviewed in the United States on March 1, 2018
Verified Purchase
A tiny PSU, I have a 12V version. As noted in other reviews, output contacts are mislabeled, the middle contact is not connected to anything.

The description says 12V 450mA in one place, and 12V 0.5A in another, but when I try to power a fan labelled 12V 0.4A, the voltage drops to 11.5V and later to 11V, and the current is only 0.33A. The smaller fan works fine, measurements show 12V 0.075A.

Based on this limited testing, I think the unit will work fine if your load is no more than 250 mA (0.25 A), giving a whopping 3W of power.
Customer image
Kirill Kolyshkin
4.0 out of 5 stars Fine for smaller loads
Reviewed in the United States on March 1, 2018
A tiny PSU, I have a 12V version. As noted in other reviews, output contacts are mislabeled, the middle contact is not connected to anything.

The description says 12V 450mA in one place, and 12V 0.5A in another, but when I try to power a fan labelled 12V 0.4A, the voltage drops to 11.5V and later to 11V, and the current is only 0.33A. The smaller fan works fine, measurements show 12V 0.075A.

Based on this limited testing, I think the unit will work fine if your load is no more than 250 mA (0.25 A), giving a whopping 3W of power.
Images in this review
Customer image
Customer image
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James C.
2.0 out of 5 stars Must use a different hole pad than the one marked "5V" on the 5 volt board.
Reviewed in the United States on December 2, 2017
Verified Purchase
The boards I received have PC board holes for input. I am using 120 AC input and the board is the 5v. The boards I received did not have 5 volts present at the PC holes though marked as 5v. In fact the 5 volt hole pad goes to pads marked for a "U3" chip that is not on the board. The 5v and the "U3" pad are not connected to anything else, therefore the 0v reading. I measured voltage on the output filter capacitor positive terminal of 4.97 volts. Apparently, the "U3" must be a regulator that is installed for the 3v power supply and perhaps a jumper should have been installed for the 5v boards. If you hook up the boards using the 5v hole pads there will be no 5 volts. I used another hole pad near the filter capacitor that had 5volts and it is working fine in my project. Powering an Arduino Nano and driving a 4 Channel relay board. Working fine so far. The rating is based on the product not functioning as labeled and the circuit board not being clean and free of the soldering residues. I bought 5, have examined each. Have only powered up one board at the present time.
3 people found this helpful
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melinda p.
5.0 out of 5 stars Happy
Reviewed in the United States on January 2, 2021
Verified Purchase
I’m happy. 11.83 volts
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G. Martin
3.0 out of 5 stars 5V output not where you'd expect it to be. Otherwise, pretty decent buck converter
Reviewed in the United States on January 16, 2018
Verified Purchase
Like another review here I had the same issue where I wasn't getting the 5V output at the labeled holes. Thanks to his review I was able to determine that U3, at a minimum, is missing a jumper. See attached photo. Red circle is U3, orange circle is where you need to solder to get 5V. Once I figured that out everything else worked like a champ. My use case is to power a Wemos D1 Mini and a 5V relay in a home automation switch. So far, so good, but the manufacturer needs to resolve the open U3 connection.
Customer image
G. Martin
3.0 out of 5 stars 5V output not where you'd expect it to be. Otherwise, pretty decent buck converter
Reviewed in the United States on January 16, 2018
Like another review here I had the same issue where I wasn't getting the 5V output at the labeled holes. Thanks to his review I was able to determine that U3, at a minimum, is missing a jumper. See attached photo. Red circle is U3, orange circle is where you need to solder to get 5V. Once I figured that out everything else worked like a champ. My use case is to power a Wemos D1 Mini and a 5V relay in a home automation switch. So far, so good, but the manufacturer needs to resolve the open U3 connection.
Images in this review
Customer image
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5 people found this helpful
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James P
1.0 out of 5 stars AWEFUL. Don’t buy this brand.
Reviewed in the United States on March 5, 2018
Verified Purchase
These are AWEFUL! I’ve tried three so far and all three have been useless. They simply pulse on and off. They can’t even power a line esp8266-01. I’ve used very similar ones from other brands successfully. Don’t know if this is a bad lot or a bad supplier.
Even the tips from other users about changing the solder points didn’t work. Just pure garbage.
3 people found this helpful
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